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04-12-2015, 08:30 AM
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#1
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DanC
1972 25' Tradewind
1972 23' Safari
Provo
, Utah
Join Date: Jun 2013
Posts: 3
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Univolt trips house breaker?
72 Tradewind ---
Probably need to replace the Univolt, but here is my question.
When the umbilical is hooked to my generator 30a outlet all works fine. When I am hooked to 30a shore power at a camp site all works fine.
When I am at home and use the 20am adapter on the 30a plug on the umbilical it trips the house breaker. Worked fine last year and at the beginning this year when I was de-winterizing, but now it trips the house 20a breaker.
Has the Univolt decided to be weird (or weirder than usual) and is it time to replace? On my 72 TW it is in the closet in the bathroom and nearly impossible to do any work on it as the door is about 8" wide.
Any ideas would be appreciated.
Thanks.
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04-12-2015, 08:36 AM
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#2
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Rivet Master
2005 39' Land Yacht 390 XL 396
Common Sense
, Texas
Join Date: Sep 2007
Posts: 5,319
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Sounds like you might have some other load on the circuit also, however if the Univolt is original '72 vintage, it's past time to replace it anyway, IMHO.
__________________
Regards,
Steve
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04-12-2015, 09:58 AM
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#3
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Rivet Master
2014 27' FB Eddie Bauer
Chelsea
, Michigan
Join Date: May 2010
Posts: 1,792
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If the idea proposed above does not pan out, try plugging into a different circuit in the house to see if it trips that breaker as well.
If that second breaker does not trip, try replacing the original breaker in the house panel with a new one. It may have gone bad.
__________________
Bob Martel
WBCCI# 5766
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04-12-2015, 10:03 AM
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#4
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Rivet Master
Vintage Kin Owner
1977 31' Excella 500
Berkeley Springs
, West Virginia
Join Date: Sep 2005
Posts: 1,638
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Progressive Dynamics
I agree with Steve. It sounds like you're pulling more than 20amps and that's tripping the breaker.
I rewired my coach for 50amp service and used a Progressive Dynamics power center. I really like having the "unlimited" power available (i.e. I can run the microwave, the a/c, and a toaster at the same time now....). We've been very happy with it.
But, you can buy just the converter from them in 30amp and replace just the power portion of the univolt and keep the panel if you want.
Or, you can roll the whole thing over the hill and replace it with one of their 30amp panels.
Or do like I did, and convert the whole thing to 50amp and never look back There's a fairly lengthy and detailed thread on here where I went over all I had to do. It's not that hard. But if you just want to swap out to a newer 30amp panel, that's a piece of cake.
There are other brands that are probably just as good. I've just read a lot of good about Progressive Dynamics, so I went that route.
Here are some power units:
RV and Motorhome Power Converters from Progressive Dynamics
Here's what I used:
Ultimate All-in-One 240V, 50 Amp AC/DC Power Distribution Panel
Their "Charge Wizard" is really nice; it works like a battery tender and knows what your batteries need. So it keeps them topped off without frying them.
Hope this helps, and see ya on the road!
__________________
- Jim
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04-12-2015, 10:33 AM
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#5
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3 Rivet Member
Currently Looking...
jackson center
, Ohio
Join Date: Jan 2011
Posts: 159
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Are you using an extension cord to plug into house or adapter straight off trailer power cord?
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04-12-2015, 10:43 AM
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#6
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Rivet Master
2011 34' Classic
Westchester Cty.NY
, / Miami FL
Join Date: Jul 2007
Posts: 3,122
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is the house breaker a gfci breaker?
__________________
Ricky
2012 F150 Super Crew 5-1/2' bed Ecoboost 4x4 3.73 elec. lock diff. Propride hitch
give life. kidney & pancreas transplant 9/9/06
Ingrid-my unofficial '"World's Oldest Streamer" 1909-2008 R.I.P.
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04-12-2015, 03:10 PM
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#7
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DanC
1972 25' Tradewind
1972 23' Safari
Provo
, Utah
Join Date: Jun 2013
Posts: 3
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Thanks for all the responses.
1. Nothing else on that circuit that is pulling a load.
2. Tried another circuit with the same results.
3. Adapter from 30 to 20 on the umbilical with the same results
4. Extension cord is a heavy industrial type.
It has worked in the past with this hookup and that is why I am thinking that the Univolt is going bad.
Sounds like it is time to retire the Univolt, but I am selling the trailer (reasons are varied and the list is long) and I don't want to put more $$ or time into it. If I could get to it without removing a couple of partitions, I might tackle it and put in some new technology and add this to the list of things replaced at the time of sale. So, I will continue to use it as is, working with campground and / or generator power and enjoy it while I still have it.
Anyway, I was looking for some other likely cause than what we all agree is the likely culprit - - - old technology.
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04-12-2015, 03:21 PM
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#8
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Rivet Master
1976 31' Sovereign
Missouri City
, Texas
Join Date: Mar 2007
Posts: 1,233
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Quote:
Originally Posted by dlclark
Thanks for all the responses.
1. Nothing else on that circuit that is pulling a load.
2. Tried another circuit with the same results.
3. Adapter from 30 to 20 on the umbilical with the same results
4. Extension cord is a heavy industrial type.
It has worked in the past with this hookup and that is why I am thinking that the Univolt is going bad.
Sounds like it is time to retire the Univolt, but I am selling the trailer (reasons are varied and the list is long) and I don't want to put more $$ or time into it. If I could get to it without removing a couple of partitions, I might tackle it and put in some new technology and add this to the list of things replaced at the time of sale. So, I will continue to use it as is, working with campground and / or generator power and enjoy it while I still have it.
Anyway, I was looking for some other likely cause than what we all agree is the likely culprit - - - old technology.
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Install 30 amp service from your home electric panel with 30amp RV box located where you park the trailer. Problem solved.
__________________
Don Hardman
1976 31' Sovereign
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04-12-2015, 08:16 PM
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#9
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Regular Guy
1978 31' Sovereign
Hot Springs
, Arkansas
Join Date: Aug 2014
Posts: 603
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Do you have a Ground Fault or Arc fault breaker feeding your AS? It is within reason that the UNIVOLT bridge rectifier would create the conditions necessary to trip them. Temporarily replace the breaker with a standard no fault breaker and see if that doesn't remedy the problem. Cheap, easy and fast.
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07-08-2015, 06:44 AM
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#10
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2 Rivet Member
1970 23' Safari
Hazeltucky
, Michigan
Join Date: Jul 2014
Posts: 47
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I had the same problem with my Safari. It ended up being that I was drawing too much power while testing out the system. I had the 110v fridge running, fan running, 15 incandescent lamps glowing and was testing the 110v outlets with a drill. Once I turned the lamps off problem solved.
Doesn't sound like this is your problem though. Someone did suggest to me that I might have gotten rain into the outside 110v outlet. I think that would trip the breaker in the trailer before tripping the house gfi it's worth a check.
Also try turning off the breaker to the univolt and see if that helps.
If it doesn't trip the problem is in your 12v system or your univolt.
If it does trip then the problem is in your 110v system.
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07-08-2015, 06:51 PM
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#11
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Rivet Master
1974 31' Sovereign
1979 23' Safari
Wayland
, New York
Join Date: Jan 2012
Posts: 1,632
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Seems like you jumped right to the univolt. Could be something else in the 120v system in the trailer. Have you unplugged univolt to see if trailer still trips house breaker or tried plugging univolt directly into extension cord?
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07-08-2015, 06:52 PM
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#12
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Rivet Master
1974 31' Sovereign
1979 23' Safari
Wayland
, New York
Join Date: Jan 2012
Posts: 1,632
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Just realized from April, probably fixed by now.
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07-18-2015, 09:46 AM
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#13
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4 Rivet Member
1990 29' Excella
Travelers Rest
, South Carolina
Join Date: Jul 2010
Posts: 311
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Quote:
Originally Posted by dlclark
72 Tradewind ---
Probably need to replace the Univolt, but here is my question.
When the umbilical is hooked to my generator 30a outlet all works fine. When I am hooked to 30a shore power at a camp site all works fine.
When I am at home and use the 20am adapter on the 30a plug on the umbilical it trips the house breaker. Worked fine last year and at the beginning this year when I was de-winterizing, but now it trips the house 20a breaker.
Has the Univolt decided to be weird (or weirder than usual) and is it time to replace? On my 72 TW it is in the closet in the bathroom and nearly impossible to do any work on it as the door is about 8" wide.
Any ideas would be appreciated.
Thanks.
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My 1990 Excel 29 does the same thing but I know why. My circuit I am plugging into is a 15 amp circuit with a 15 amp breaker. If I draw more than 15 amps the circuit breaker on my house breaker box trips. I can run my AC, or my fridge on electric, or the fans, but I can't run the AC and anything much else. Lights are ok as I switched over to LEDs. Your circuit may just be too small. Check the size of the breaker in your house that is tripping. One solution is to have that circuit upgraded from main box to the outside outlet to 30 or more amps.
__________________
WBCCI 2456 Georgia Unit 32
1990 Excella 29' Centramatics
2016 GMC Sierra Crew Cab 2500 HD 4x4
6.6L Duramax + Allison, 3.73 axles
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